1 Unit of Oncological Gastroenterology, Department of Medical Oncology, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, Via Franco Gallini, 2, Aviano 33081, Italy. Electronic address: rcannizzaro@cro.it.
2 Unit of Medical Oncology and Cancer Prevention, Department of Medical Oncology, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, Aviano, Italy; Department of Medicine (DAME), University of Udine, Udine, Italy. Electronic address: fabio.puglisi@cro.it.